Was given in the problem?
The volume of a cone, of height h and base radius r, is given by . Here, you are told that the "semi-vertical angle" is 60 degrees so using . , and . That is where that formula came from.

To change to a "rate of change" formula, differentiate both sides with respect to t, using the chain rule.

Was given in the problem?
The volume of a cone, of height h and base radius r, is given by . Here, you are told that the "semi-vertical angle" is 60 degrees so using . , V= \pi h^3[/tex]. That is where that formula came from.

To change to a "rate of change" formula, differentiate both sides with respect to t, using the chain rule.